A sensitive girl redeems herself in a dark world when she meets her childhood sweetheart, a sunny boy, who gives her the sunshine of the world.
It is the brightest light in her world.
They went through hardships and happy days together, but were broken up by He An's adoptive parents. He An and his parents had to go abroad, and the two were separated again. When they met again, both of them were mature. When fate arranged for them to be together again, He An suddenly fell ill.
This separation is the separation of yin and yang.
Purpose: Everyone hopes to encounter redemption in their darkest moments